// ***********************************************************************
// Assembly         : Unity
// Author           : Kimch
// Created          : 
//
// Last Modified By : Kimch
// Last Modified On : 
// ***********************************************************************
// <copyright file= "KUIImage" company=""></copyright>
// <summary></summary>
// ***********************************************************************
using UnityEngine;
using UnityEngine.UI;

[AddComponentMenu("UGUICustom/KUIImage")]
[RequireComponent(typeof(Image))]
public class KUIImage : MonoBehaviour
{
	#region Field

	public int framesPerSecond;

	public bool loop;

	public Sprite[] sprites;

	public bool usePolygon;

	private int _loopIndex;
	private float _loopTime;

	private Image _image;

	#endregion

	#region Property

	public Sprite sprite
	{
		get { return _image.overrideSprite ?? _image.sprite; }
		set { _image.overrideSprite = value; }
	}

	#endregion

	#region Method

	public void SetDefaultSprite(int index)
	{
		if (!_image)
		{
			_image = GetComponent<Image>();
		}

		if (sprites != null && index >= 0 && index < sprites.Length)
		{
			_image.sprite = sprites[index];
		}
	}

	public void ShowSprite(int index)
	{
		if (!_image)
		{
			_image = GetComponent<Image>();
		}

		if (sprites != null && index >= 0 && index < sprites.Length)
		{
			_image.overrideSprite = sprites[index];
		}
		else
		{
			_image.overrideSprite = null;
		}
	}

	public void ShowSprite(string name)
	{
		if (!_image)
		{
			_image = GetComponent<Image>();
		}

		if (sprites != null)
		{
			foreach (var sprite in sprites)
			{
				if (sprite && name == sprite.name)
					_image.overrideSprite = sprite;
			}
		}
		else
		{
			_image.overrideSprite = null;
		}
	}

	public void ShowRandom()
	{
		if (sprites != null)
		{
			_image.overrideSprite = sprites[Random.Range(0, sprites.Length)];
		}
	}

	public void ShowGray(bool gray)
	{
		if (!_image)
		{
			_image = GetComponent<Image>();
		}
		_image.material = gray ? Resources.Load<Material>("Materials/UIGray") : null;
	}

	/// <summary>
	/// 剪影
	/// </summary>
	/// <param name="sketch"></param>
	public void ShowSketch(bool sketch)
	{
		if (!_image)
		{
			_image = GetComponent<Image>();
		}
		_image.material = sketch ? Resources.Load<Material>("Materials/UISketch") : null;

	}

	private void Awake()
	{
		_image = GetComponent<Image>();
	}

	private void Update()
	{
		if (sprites != null && framesPerSecond > 0)
		{
			var per = 1f / framesPerSecond;
			_loopTime += Time.deltaTime;
			if (_loopTime > per)
			{
				_loopTime -= per;
				_loopIndex++;
				if (loop || _loopIndex < sprites.Length)
				{
					_loopIndex %= sprites.Length;
					_image.overrideSprite = sprites[_loopIndex];
				}
			}
		}
	}

	#endregion

}